XVault supports both SIF and Non-SIF zones.
In SIF zones you will need to have a work SIF Infrastructure and you will need to use Groupcall Xporter SIF Agent to connect schools to your SIF infrastructure. Using SIF zones allows for easy addition of write-back and event driven functionality in the future.
In Non-SIF zones you do not need a ZIS and can use the Xporter Non-SIF Agent to connect and provide data. Non-SIF Zones are cheaper to deploy but require you to follow the upgrade path to SIF zones before you can take advantage of write-back and event driven functionality.